JPH099382A - Radio earphone for battery-driven stereo acoustic reproducing device - Google Patents

Abstract

PURPOSE: To provide the cordless earphone not requiring management of battery. CONSTITUTION: Left/right earphones 6 not in use are contained in an auxiliary battery case 2 mounted removably to a player body 1 and a charging battery for reception means built in the left/right earphones 6 is charged in this case. Since the power consumed at reception by the left/right earphones 6 is sufficiently smaller than the power consumed when the player main body 1 conducts playing, the charging capacity at one charging is sufficiently decreased and the capacity of the charging battery built in the left/right earphones 6 is enough to be small.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a cassette player,
The present invention relates to a wireless earphone for a battery-powered stereo sound reproducing device such as a compact desk player.

[0002]

2. Description of the Related Art In a conventional magnetic tape type small portable cassette player (hereinafter abbreviated as a cassette player), a compact optical desk player (hereinafter abbreviated as a desk player), etc., a player body and an earphone portion are cordless. Some are connected by means.

AM is generally used as a cordless means.
Modulation wireless type, FM modulation wireless type, infrared light communication type, etc. are mainly used, but the electromagnetic induction type that has been used for a long time can also be used. These are commonly called transmitters,
It is configured by mutual conversion of acoustic signal-radio signal and radio signal-acoustic signal in which a transmitter and a receiver are paired.

Acoustic signal in the above cordless means-
There are two types of transmitters that form a wireless signal conversion unit, one of which is a type in which the transmitter is integrally mounted on the player main body, and the other is of a type in which the player main body and the transmitter are separately configured.

The receiving section is generally a receiver forming a radio signal-acoustic signal converting section, to which an existing earphone is detachably attached. However, recently, in the case of earplug earphones that are small and convenient to carry, many have earphone cords that are permanently fixed to the receiver.

The one in which the receiver and the earphone are integrally structured is a binaural type having a head-mounted arm, which is commonly called a headphone, and a receiver mounted on the head-mounted arm or the like. is there.

On the other hand, recent audio devices are mainly stereo audio devices, and the transmitting / receiving section mainly adopts a two-channel stereo signal modulation system. Therefore, the receiving unit has a structure in which left and right stereo signals are sent from one receiver to the left and right earphones via the earphone cords.

[0008]

Since cassette players and compact desk players intended for carrying are battery-powered, efforts have been made to reduce power consumption as much as possible and prolong continuous use time. .

Particularly, in the case of using a rechargeable secondary battery, the volume of the battery and the charging capacity are almost proportional,
Reducing the volume of the player body means shortening the continuous use time.

In such a situation, using a battery-operated cassette player or a compact desk player as a cordless earphone with an integrated transmitter means that the power source of the transmitter is supplied from a built-in battery, and continuous use time (generally, The continuous playing time, etc. and the time when the reproduced sound output is continuously obtained) is shortened.

In particular, the built-in battery has a minimum charge capacity, which is set to a minimum value in advance, as a minimum capacity, which is commensurate with the usage time during general commuting and commuting to and from school. Type batteries have no room to supply power to other electronic devices.

Therefore, making the player main body and the transmitter into an integrated structure means that the player main body is large and heavy, and the cordless type rechargeable type 2 is used.
There is the inconvenience of having to prepare the next battery separately.

Therefore, when the transmitter is constructed separately from the player body, a battery dedicated to the transmitter and a dedicated charger are required.

Further, since the receiver also requires a power source, if the power source of the receiver is composed of a rechargeable secondary battery, a cordless cassette player or a compact desk player has three types of batteries having different charge capacities. You must manage the charging status of.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a cordless cassette player or a compact desk player that does not require battery management.

[0016]

The present invention solves the above-mentioned problems as follows.

A wireless earphone device for a battery-type stereo sound reproducing device according to the present invention includes an auxiliary battery case detachably attachable to a battery-type stereo sound reproducing player body for reproducing a stereo sound source, and an auxiliary battery case. When it is stored and the auxiliary battery case is attached to the player main body, it is connected to the player main body through an appropriate connection electrode and the auxiliary battery that supplies auxiliary power to the player main body and the power is supplied from the auxiliary battery. And a radio signal transmitting means adapted to input a stereo signal from the player body, which converts at least two-channel acoustic signals into a radio signal and transmits the radio signal, and a radio signal transmitting means which is housed in the auxiliary battery case when not in use. , Equipped with a rechargeable battery that is charged by the output voltage of the auxiliary battery via the required charging circuit While being removed from the case and attached to the left and right ears respectively, power is separately supplied from the rechargeable battery to the left and right to receive the radio signal transmitted by the radio signal transmitting means and Left and right earplug earphones that are equipped with receiving means for converting stereo signals of left and right channels into electroacoustic signals, and also with acoustic converting means for converting the received electroacoustic signals into voice vibrations. ing.

It is preferable that the radio signal transmitting means is a frequency modulation type stereo radio wave transmitting device.

The rechargeable battery in the left and right earplug earphone devices is a secondary battery which has a higher output terminal voltage than the auxiliary battery in the auxiliary battery case, which is charged in the charging circuit through the voltage doubler generation circuit. preferable.

The rechargeable battery in the left and right earplug earphone devices is preferably a secondary battery whose output terminal voltage is lower than that of the auxiliary battery in the auxiliary battery case.

It is preferable that the left and right earplug earphone devices lead out antenna conductor wires of a required length coupled to the left and right receiving means, respectively.

It is preferable that the antenna lead wires derived from the left and right earplug earphone devices are conductive chains capable of electrically connecting the annular bodies.

It is preferable that the ends of the left and right antenna lead wires led from the earplug type earphone device are electrically disconnected from each other.

[0024]

When the left and right earphones are not used and are housed in the auxiliary battery case, the rechargeable battery for receiving means built in each earphone is charged. The power consumed by each earphone at the time of reception is sufficiently smaller than the power consumed by the player body, so the capacity of the rechargeable battery should be small and the power consumption by charging the auxiliary battery should not be large.

[0025]

FIG. 1 shows an embodiment of the present invention.

Reference numeral 1 is a battery-type stereo sound reproduction player main body for reproducing a stereo sound source, and reference numeral 2 is an auxiliary battery case which can be detachably attached to the player main body 1.

When the auxiliary battery case 2 is attached to the player main body 1, it is connected to the auxiliary battery case 2 through a connection electrode 3 provided on a side surface of the player main body 1 to assist the player main body 1. An auxiliary battery 4 for supplying power is stored.

Further, the auxiliary battery case 2 is supplied with power from the auxiliary battery 4 and is capable of receiving a stereo signal from the player main body 1, at least 2.
A wireless signal transmitting means 5 for converting the acoustic signal of the channel into a wireless signal and transmitting the wireless signal is housed.

The auxiliary battery case 2 can accommodate a pair of left and right earplug earphones 6 when not in use.

FIG. 2 is an electrical block diagram showing the left and right earplug earphones 6 housed in the auxiliary battery case 2. The left and right earplug type earphones 6 each include a rechargeable battery 7 that is charged by the output voltage of the auxiliary battery 4 via a charging circuit to be described later when being housed in the auxiliary battery case 2.

Further, the left and right earplug earphones 6 are detached from the auxiliary battery case 2 and attached to the left and right ears, respectively, at the time of use thereof, and the electric power is supplied from the rechargeable battery 7, Receiving means 8 for receiving the radio signal transmitted by the radio signal transmitting means 5 and for converting a stereo signal of a channel corresponding to the left and right of the ear to be worn into an electroacoustic signal, and the electroacoustic signal for converting into a voice vibration. The sound converting means 9 is provided.

That is, when the earphone 6 is housed in the auxiliary battery case 2, the connection electrode 10 provided on the case side.
And via the connection electrode 11 provided on the earphone 6 side,
It is electrically connected and stored.

The battery auxiliary case 2 is provided with a charging circuit 12 for a secondary battery, which uses the auxiliary battery 4 as a power source, for each earphone 6, and the connection electrode 10 on the case side is the charging circuit 1 thereof.
2 output.

FIG. 3 shows an example of the charging circuit 12. When the battery of the earphone 6 is a rechargeable battery as a secondary battery, the auxiliary battery 4 is an AA type manganese dry battery or an alkaline dry battery which is normally used. One voltage 0.8-1.8
It is also impossible to charge one cell of a normal secondary battery with a volt.

Further, the earphone 6 has a small volume,
In order to make it lightweight, if the rechargeable battery 7 is a lithium ion storage battery with a high volume energy density, the voltage per cell will be 1.5 V or more, and AA type dry batteries 1 It cannot be charged with individual output voltages.

FIG. 3 shows an example of a booster circuit for obtaining a voltage higher than the DC voltage of the auxiliary battery 4 without using a reactance element such as a coil. The charging circuit 12 is a diode pump type booster circuit using a low voltage drive type CMOS IC logic circuit element 14.

The logic circuit element 14 is composed of four inverter circuits 14a to 14d, and two of the inverter circuits 14a and 14b constitute a multivibrator type free-running oscillator circuit.

The other two inverter circuits 14c and 14d
Are switch circuits that are driven by the respective outputs of the inverter circuits 14a and 14b.

The diode pump circuit 15a using the inverter circuit 14a as a switch circuit outputs a positive output voltage from the positive line 16 of the auxiliary battery 4, and the diode pump circuit 15b using the inverter circuit 14b as a switch circuit, A negative output voltage is output from the negative line 17 of the auxiliary battery 4, respectively.

Positive and negative diode pump circuits 15a, 15
Each output of b is connected to the earphone 6 via the connection electrodes 10 and 10 to charge the rechargeable battery 7 built in the earphone 6.

On the other hand, the auxiliary battery case 2 has a built-in radio signal transmission means 5, and the radio signal transmission means 5 is FM.
A stereo modulation type wireless transmitter transmits a stereo sound signal from an earphone jack 18 of the player main body 1 through a connection plug 19.

The radio signal transmitting means 5 is the player body 1
The stereo sound signal reproduced by is converted into a radio wave of FM stereo modulation and transmitted from the built-in antenna 20. As shown in FIG. 4, the earphone 6 is removed from the auxiliary battery case 2 during use.

The earphone 6 receives the radio signal transmitted by the radio signal transmitting means 5 and converts an audio signal of one of the left and right channels corresponding to the left and right of the ear to be worn into an electroacoustic signal. Stereo modulation type receiving means 8
And a dynamic or magnetic acoustic converting means 9 for converting an electroacoustic signal output from the receiving means 8 into a voice vibration.
The sound output part of the and the through hole 22 of the earplug part 21 communicate with each other.

The antenna 23 of the receiving means 8 is led out of the earphone 6 with a required length L by means of a conductive ultrathin chain. The tips of the antennas 23 of the left and right earphones 6 are connected by a non-conductive coupling body 24, for example, a chain made of synthetic resin.

As a result, even if one of the left and right earphones 6 is accidentally dropped during use, since both are connected by the chain, there is no risk of loss. Further, by forming the antenna 23 and the coupling body 24 into a chain, as shown in FIG. 5, when the antenna 23 and the coupling body 24 are housed in the auxiliary battery case 2, the chain is entangled with the extremely small volume. It is stored without any.

The antennas 23 of the left and right earphones 6
If the length L of the antenna is long enough to be attached to the left and right ears even if the tips of both antennas 23 are connected, the combined body 2
4 may be a small electrically insulating connector.

On the other hand, the left and right earphones 6 can be provided with switches for turning ON / OFF the receiving operation, but most of the power consumption of the earphones 6 is converted by the acoustic conversion means 9 into audio signals. Since the power consumption of the wireless signal transmission means 5 is minimized, the power consumption of the reception means 8 is minimized.
It becomes negligible without F, and there is no need to provide a switch.

The volume can be adjusted by adjusting the voice input of the radio signal transmitting means 5 by the volume adjusting volume of the player main body 1. Therefore, it is not necessary to adjust the earphone 6 in particular. . Needless to say, it is not preferable to adjust the volume of each of the earphones 6, because the left and right balance of the stereo signal is lost.

Although the embodiments of the present invention have been described above with reference to the drawings, the specific configuration is not limited to these embodiments, and even if there are changes and additions within the scope not departing from the gist of the present invention, the present invention is not limited. Included in the invention.

[0050]

According to the present invention, the following effects can be obtained.

(A) Since the left and right earphones are charged from the auxiliary battery every time they are stored in the auxiliary battery case, it is not necessary to manage the remaining battery level for each of the left and right earphones.

(B) The auxiliary battery is a highly versatile AA-type manganese dry battery or an alkaline dry battery, and the secondary battery incorporated in the earphone has a volume energy of a relatively high cell voltage such as a lithium battery. Since a compact and high-density one can be used, a cordless earphone device having high economical efficiency, versatility and functionality is provided.

(C) It is possible to provide a cordless earphone device which is small and convenient to carry.

(B) The antenna of the receiver serves as a connecting cord to prevent falling, and the respective functions work synergistically,
The cordless earphone device can be miniaturized and is highly convenient.

(E) By forming the antenna of the receiver and the combination of the antennas into a chain, when the left and right earphones are stored in the auxiliary battery case, the chain portion is stored in a small volume without being entangled. it can.

[0056]

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical connection relationship of the present invention.

FIG. 3 is an electric circuit diagram showing a specific example of a charging circuit for a secondary battery incorporated in an earphone.

FIG. 4 is an exploded perspective view of the left and right earphones, which is close to the usage state.

5 is a vertical cross-sectional view taken along the line VV in FIG.

[Explanation of symbols]

 1 Player Main Body 2 Auxiliary Battery Case 3 Connection Electrode 4 Auxiliary Battery 5 Radio Signal Transmitting Means 6 Earphone 7 Rechargeable Battery 8 Receiving Means 9 Sound Transducing Means 10 Connection Electrodes 11 Connection Electrodes 12 Charging Circuit 14 Logic Circuit Elements 14a-14d Inverter Circuit 15a , 15b Diode pump circuit 16 Positive polarity line 17 Negative polarity line 18 Earphone jack 19 Connection plug 20 Antenna 21 Earplug 22 Through hole 23 Antenna 24 Combined body

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display area H04R 5/033 H04R 5/033 C Z

Claims (7)

[Claims] 1. A battery type stereo sound reproducing player body for reproducing a stereo sound source, an auxiliary battery case detachably mountable, and an auxiliary battery case housed in the player body when the auxiliary battery case is mounted on the player body. In addition, an auxiliary battery that is connected to the player body through an appropriate connection electrode to supply auxiliary power to the player body, and power is supplied from the auxiliary battery and a stereo signal can be input from the player body. A radio signal transmitting means for converting at least two channels of acoustic signals into a radio signal and transmitting the radio signal;
It is equipped with a rechargeable battery that is charged by the output voltage of the auxiliary battery via a required charging circuit, and is detached from the auxiliary battery case when used and attached to the left and right ears, respectively, and the power source is left and right from the rechargeable battery. Each of them is provided with a receiving unit that is supplied individually and receives the wireless signal transmitted by the wireless signal transmitting unit, and that converts a stereo signal of a channel corresponding to the left and right of the ear to be worn into an electroacoustic signal, and A wireless earphone device for a battery-type stereo sound reproducing device, comprising left and right earplug type earphones provided with an acoustic converting means for converting a received electroacoustic signal into a sound vibration. 2. The wireless earphone device for a battery-type stereo sound reproducing device according to claim 1, wherein the wireless signal transmitting means is a frequency modulation type stereo wireless radio wave transmitting device. 3. The rechargeable battery in the left and right earplug earphone devices is a secondary battery that has a higher output terminal voltage than the auxiliary battery in the auxiliary battery case and is charged in the charging circuit via the voltage doubler generation circuit. A wireless earphone device for a battery-powered stereo sound reproducing device according to claim 1. 4. The battery-powered stereo sound reproducing device according to claim 1, wherein the rechargeable battery in the left and right earplug earphone devices is a secondary battery whose output terminal voltage is lower than that of the auxiliary battery in the auxiliary battery case. Wireless earphone device. 5. The battery-type stereo sound reproducing device according to claim 1, wherein the left and right earplug type earphone devices lead out antenna conductor wires of a required length coupled to the left and right receiving means, respectively. Wireless earphone device for smartphones. 6. The radio for a battery-powered stereo sound reproduction device according to claim 5, wherein the antenna conductors derived from the left and right earplug type earphone devices are conductive chains capable of electrically connecting the respective annular bodies. Earphone device. 7. A battery-powered stereo sound reproduction system according to claim 5, wherein the antenna conductors led out from the left and right earplug type earphone devices are connected to each other with their ends electrically disconnected from each other. Wireless earphone device for the device.